animation of Jo in clouds

About Me

Senior Software Engineer at Visa with 3+ years of experience building distributed systems that process billions of transactions annually. I specialize in low-latency microservices, data pipelines handling 100GB/day, and automation that reduced release cycles from 1 month to 1 week.

When I'm not debugging production issues or mentoring engineers, I'm building AI-powered side projects. My latest is Remy — an app that transforms social media recipes into smart grocery lists using LLMs.

Outside of code, you'll find me surfing, snowboarding, playing basketball, or making music on guitar and piano.

EXPERIENCE

VISA

Foster City, CA
Jan 2023 – Present

Senior Software Test Engineer

January 2025 – Present
  • Engineer on Visa's next-generation global authorization platform handling hundreds of billions of transactions per year
  • Designed low-latency, high-throughput microservices using Go, Kafka, Cassandra with strong emphasis on fault tolerance
  • Owned critical authorization workflows for Nigeria's payment ecosystem, scaling toward 6–22B transactions annually
  • Debugged production issues across network, service, and data layers with incident turnaround under 36 hours
Go Kafka Cassandra MySQL Docker Kubernetes

Software Test Engineer

January 2023 – January 2025
  • Built Selenium-based automation framework with Jenkins CI/CD, increasing test coverage 6x
  • Reduced release sign-off time from 1 month to 1 week
  • Developed and validated high-volume data pipelines processing up to 100GB/day
  • Led integration testing for real-time and batch systems ensuring backward compatibility
Python Selenium Jenkins Kafka

FREELANCE

San Luis Obispo, CA
May 2022 – Dec 2023

Full-Stack Developer

Web Developer for Bob and Beth Whitworth
  • Managed frontend and backend operations for 3 WordPress websites promoting "Through My Eyes" book
  • Migrated websites from outdated server using FTP and data backups
  • Updated PHP and plugins, troubleshot compatibility errors with legacy software
  • Designed new frontend layouts for 8+ year old websites
WordPress PHP MySQL FTP JavaScript HTML/CSS

CAL POLY IT

San Luis Obispo, CA
2021 – 2022

IT Support Technician

  • Provided technical support for campus network and systems
  • Troubleshot hardware and software issues for students and faculty
Networking Troubleshooting Scripting Unix/Linux

EY

Los Angeles, CA
Summer 2021

Technology Consulting Intern

  • Participated in client engagements for technology transformation projects
  • Collaborated with cross-functional teams on deliverables
Consulting Agile

CAL POLY SLO

San Luis Obispo, CA
2018 – 2022

B.S. Information Systems

Focus: Computer Science
  • AWS Certified Solutions Architect – Associate
  • Relevant coursework: Data Structures, Algorithms, Databases, Software Engineering
  • Delta Chi Fraternity Alum, National Society of Black Engineers
AWS Java Python C++

SKILLS

LANGUAGES

Python Java Go JavaScript TypeScript SQL C C++ Ruby PHP Solidity HTML/CSS

FRAMEWORKS & LIBRARIES

Next.js React Node.js Tailwind CSS Bootstrap Selenium

DATABASES & STORAGE

PostgreSQL MySQL Cassandra DB2 Supabase

INFRASTRUCTURE & DEVOPS

Kubernetes Docker Kafka AWS Jenkins Git Unix

TOOLS & PLATFORMS

OpenAI API Cursor Claude Code Claude Cowork JIRA WordPress Agile/Scrum Excel

PROJECTS

FEATURED
Remy Web App

REMY WEB APP

AI-powered app that extracts recipes from Instagram, TikTok, YouTube, and websites, transforming them into structured grocery lists with Instacart integration.

Next.js React TypeScript Supabase OpenAI

Contact me

Email: josiahkerrick@gmail.com

Phone: 484-881-1766